hycean

== English == === Etymology === Blend of hydrogen +‎ ocean. Coined in 2021. === Pronunciation === IPA(key): /ˈhaɪʃən/ === Adjective === hycean (not comparable) (astronomy, planetology, of a planet, neologism) Having a water-based ocean that covers the entire planet, and an atmosphere rich in hydrogen. ==== Usage notes ==== Sometimes unnecessarily capitalised, possibly reflecting a false assumption about the etymology. === See also === ocean world === Further reading === Ocean world on Wikipedia.Wikipedia === Anagrams === Cheyna, Ceyhan, Chaney